简介：AmericanacademicPaulYellandfacesaccusationsofracismwhenhepresentshistheoryonCriminalDangerousnesstoanOxfordcollegeandislaterfoundmurdered.MarriedprofessorsAnneandRobertFraserclaimtheyinvitedhimtoraisetheirdepartment'sprofileandRobert,whoishavinganaffairwithstudentNina,pointsLewistowardsMyraBennett'santi-fascistgroup.Yellandalsodealtinantiquesandhadangeredtwoclientswithaforgeryandfurthermoreturnedouttobethefatherofastaffmember,whosemotherhedesertedwhenpregnant.ThenNinaiskilledafterAnnehasdiscoveredtheaffair.Lewismustnotonlyexposeakillerwhosemotivegoesbackmanyyearsbutbattlewithtooth-acheinthelightofhisfearofdentists.…